CN110409382B

CN110409382B - Spiral rolling construction method for earth and rockfill dam face

Info

Publication number: CN110409382B
Application number: CN201910608954.3A
Authority: CN
Inventors: 胡志根; 聂鹏; 杨子宇; 刘全; 廖若川; 王哲鑫; 周元; 黄维
Original assignee: Wuhan University WHU
Current assignee: Wuhan University WHU
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-07-24
Anticipated expiration: 2039-07-08
Also published as: CN110409382A

Abstract

The invention discloses a spiral rolling construction method for an earth and rockfill dam surface, which comprises the steps of firstly determining the size of a bin surface according to the net rolling width B, rolling the outermost side line of a trajectory line of the designed bin surface in a forward direction by a rolling machine in a clockwise direction, then gradually rolling the rest part of the bin surface in a spiral forward mode inwards, and recording the process as forward rolling; rolling along the spiral path of the rolling trajectory line at the center of the bin surface in a reverse direction in an outward and anticlockwise direction until the rolling starting point in the step 1 is returned, and recording the process as reverse rolling; and then, repeating the step 1 and the step 2 to roll the bin surface until the bin surface meets the rolling requirement. The spiral rolling construction method can realize automatic control of the running track, the size of the bin surface can be adjusted according to construction conditions, and the spiral rolling construction method has good applicability; the invention has simple operation and is easy to realize the flow process of mechanization and automatic control of the track.

Description

Spiral rolling construction method for earth and rockfill dam face

Technical Field

The invention belongs to the field of dam body compaction construction of hydraulic and hydroelectric engineering, relates to a dam face rolling construction method, and particularly relates to a spiral rolling construction method for a dam face of an earth and rockfill dam.

Background

The earth and rockfill dam includes various rolling earth and rockfill dams and earth and rockfill mixed dams, which are dam types using local materials. When filling a dam, in order to reduce gaps of filling materials and improve the integrity and structural stability of the dam, the dam needs to be compacted. The dam body compaction is one of important processes of filling, and the rolling mode of the dam body compaction has the characteristics of high operability, convenience in quality control, avoidance of missing rolling or over rolling and the like. At present, there are many rolling and walking modes, such as advancing and retreating offset method and ring-rotating sleeve pressing method. Because the running mode of the rolling machines is unreasonable in design or complicated in operation, the conditions of missing rolling, over rolling and the like are easy to occur, the filling quality of the dam body is influenced, and potential safety hazards are brought.

Disclosure of Invention

Aiming at the limitation of the rolling method, the invention aims to provide a method for the rolling construction of the dam face of the earth-rock dam, which meets the construction aim of good rolling quality and reducing missing rolling or over rolling and ensures the compaction effect of the dam body.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the spiral rolling construction method and algorithm for the earth and rockfill dam face are characterized by comprising the following steps:

step 1: determining the size of the bin surface according to the rolling net width B, rolling in a forward direction by a rolling machine in a clockwise direction on the outmost side line of a trajectory line of the designed bin surface, then gradually rolling the rest part of the bin surface inwards in a spiral advancing manner, and recording the process as forward rolling;

step 2: after the step 1 is finished, rolling outwards and anticlockwise along the spiral path of the rolling trajectory line at the center of the bin surface in a reverse direction until the rolling starting point of the step 1 is returned, and recording the process as reverse rolling;

and step 3: and (3) repeating the step 1 and the step 2 to roll the bin surface until the bin surface meets the rolling requirement.

Preferably, in the

steps

1 and 2, at the turning point of the spiral advancing manner, the turning radius is an integral multiple of the rolling width B, and the adjacent turning track lines are concentric arcs.

Preferably, in step 1 and step 2, the turning radius of each outward track line is added with one time of the net rolling width, and the distance between the track lines is always the net rolling width B, so that the rolling is not avoided and is not avoided.

Preferably, in step 1, the specific method for determining the size of the bin surface according to the mill roll width B is as follows:

determining the bin surface to be a quadrilateral bin surface with the length of L +2nB and the width of (2n +1) B according to the net rolling width B, recording the turning radius of the outermost layer as R_nThe turn radius of the secondary outer layer is R_n-1The formula is asThe following:

R_n＝nB,(n＝1,2,3,...)

R_n-1＝(n-1)B,(n＝1,2,3,...)

in the above formula, n is a non-zero natural number.

Preferably, in the rolling process of the step 1 and the step 2, the time precision is less than 0.0003 second.

The invention has the advantages and beneficial effects that:

1. the invention analyzes the rolling construction method of the earth-rock dam, provides a spiral rolling construction method, and avoids the quality defects of missing rolling or over rolling and the like caused by the construction and rolling of the dam surface;

2. the spiral rolling construction method can realize automatic control of the running track, the size of the bin surface can be adjusted according to construction conditions, and the spiral rolling construction method has good applicability;

3. the invention has simple operation and is easy to realize the flow process of mechanization and automatic control of the track.

Drawings

Fig. 1 is a forward rolling operation diagram of a construction machine according to an embodiment of the present invention;

fig. 2 is a reverse rolling operation diagram of a construction machine according to an embodiment of the present invention;

FIG. 3 is a graphical representation of a path at the center of a roll for an embodiment of the present invention;

FIG. 4 is a graph of a path algorithm at the roll center of an embodiment of the present invention;

FIG. 5 is a flow chart of a spiral rolling construction method for an earth and rockfill dam facing according to an embodiment of the present invention.

Detailed Description

In order to facilitate the understanding and implementation of the present invention for those of ordinary skill in the art, the present invention is further described in detail with reference to the accompanying drawings and examples, it is to be understood that the embodiments described herein are merely illustrative and explanatory of the present invention and are not restrictive thereof.

Referring to fig. 1 to 5, the spiral rolling construction method for the dam face of the earth and rockfill dam provided by the embodiment includes the following steps:

step 1: in this example, the rootDetermining the bin surface to be a quadrilateral bin surface with the length of L +2nB and the width of (2n +1) B according to the net rolling width B, wherein L is any length and can be adjusted according to actual conditions, as shown in figure 1, a solid line is a track line during rolling, and a dotted line is a path line at the center of rolling, rolling machinery rolls in the advancing direction in the clockwise direction of the outermost side line of the track line of the designed bin surface, gradually rolls the rest part of the bin surface inwards in a spiral advancing manner, the turning radius is gradually reduced along with each inward layer of the track line, the track lines of two adjacent layers are concentric arcs, the turning radius of the two adjacent layers is different by one net rolling width B, and the turning radius of the outermost layer is recorded as R_nThe turn radius of the secondary outer layer is R_n-1Wherein:

R_n＝nB,(n＝1,2,3,...)

R_n-1＝(n-1)B,(n＝1,2,3,...)

preferably, in order to improve construction accuracy and prepare for automated line production, an algorithm model of the milling path line at the milling center is established as shown in fig. 3 and 4, assuming that the bin face is L +2nB meters long and (2N +1) B meters wide, the milling machine travel speed is maintained at v meters/second, the number of bin face milling passes is N, and the time accuracy is 0.0001 second.

Step 2: as shown in fig. 2, after step 1 is completed, rolling in a reverse direction along a spiral path of the rolling trajectory outward counterclockwise at the center of the bin face, the rolling path being the same as step 1, but in the opposite direction. Until the rolling starting point in the step 1 is returned, recording the rolling times of the bin surface;

and step 3: and (3) checking the number of times of rolling the bin surface, if the number of times of rolling does not meet the standard requirement, repeating the step (1) and the step (2) to roll the bin surface until the bin surface meets the rolling requirement.

It should be understood that parts of the specification not set forth in detail are well within the prior art.

It should be understood that the above description of the preferred embodiments is given for clarity and not for any purpose of limitation, and that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The spiral rolling construction method for the dam face of the earth and rockfill dam is characterized by comprising the following steps:

step 1, determining the size of a bin surface according to the net rolling width B, rolling in a forward direction in a clockwise direction by a rolling machine on the outmost side line of a track line of a designed bin surface, and then gradually rolling the rest of the bin surface inwards in a spiral advancing manner, wherein the process is recorded as forward rolling;

step 2, after the step 1 is completed, rolling outwards and anticlockwise along the spiral path of the rolling trajectory line at the center of the bin surface in a reverse direction until the rolling starting point in the step 1 is returned, and recording the process as reverse rolling;

step 3, repeating the step 1 and the step 2 to roll the bin surface until the bin surface meets the rolling requirement;

in the step 1, the specific method for determining the size of the bin surface according to the rolled width B is as follows:

determining the bin surface to be a quadrilateral bin surface with the length of L +2nB and the width of (2n +1) B according to the net rolling width B, wherein L is the length of a rolling track line at the center of the bin surface, adjacent turning radii are different by one net rolling width B, and the turning radius of the outermost layer is recorded as R_nThe turn radius of the secondary outer layer is R_n-1The formula is as follows:

R_n＝nB,n＝1,2,3,...

R_n-1＝(n-1)B,n＝1,2,3,...

in the above formula, n is a non-zero natural number.

2. The spiral rolling construction method for the dam face of the earth and rockfill dam as claimed in claim 1, wherein: in the step 1 and the step 2, at the turning position in the spiral advancing mode, the turning radius is integral multiple of the rolling net width B, and the adjacent turning track lines are concentric arcs.

3. The spiral rolling construction method for the dam face of the earth and rockfill dam as claimed in claim 2, wherein: in the rolling process of the step 1 and the step 2, the time precision is less than 0.0003 second.